机译:Er3 +离子浓度对Er3 +:YAG晶体中原子原子相干对超大折射率的影响
College of Physics Jilin University Changchun 130023 China;
Key Laboratory of Coherent Light Atomic and Molecular Spectroscopy Ministry of Education of China Jilin University Changchun 130023 China;
electromagnetically induced transparency; concentration; high index of refraction with zero absorption;